參數(shù)資料
型號: IBM3209K4060
英文描述: Telecom Switching Circuit
中文描述: 電信開關(guān)電路
文件頁數(shù): 128/131頁
文件大?。?/td> 1679K
代理商: IBM3209K4060
PRS28.4G
IBM Packet Routing Switch
Line Termination
Page 128 of 131
prs28.03.fm
August 31, 2000
11. Line Termination
11.1 HSTL
The master-slave speed expansion bus, composed of SEQ_CLK, MS_SYNC, MS_DASLSYNC,
MS_IN_ADDR and MS_OUT_ADDR, used HSTL EIA/JEDEC (EIA/JESD8-6) standard compliant IO books.
The following figure gives the recommended termination of those receiver lines
.
Note:
The termination network has to be placed within 5 cm from the receiver device.
11.2 DASL and SYS_CLK
The DASL data inputs (DATA_IN_
nn
_Q(
i
) and DATA_IN_
nn
_QN(
i
)) and the clock reference (SYS_CLK_Q
and SYS_CLK_QN) used differential HSTL EIA/JEDEC (EIA/JESD8-6) standard compliant IO books. The
following figure gives the recommended termination for those receiver lines.
The termination network has to be placed within 2.5 cm from the receiver device.
There must not be additional via besides the ones required for the chip soldering, the 51 ohms network and
the backplane connector. An artwork is available.
Figure 15: HSTL Termination
Figure 16: DASL Termination for Slave LUs
V
DDQ
= 1.5V
100
±
5%
GND
100
±
5%
DVR
51
±
5%
51
±
5%
10 nF
GND
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